Improvement in fire-place stoves



A. CARSON.

Fireplace Stove.

Patented March 29 N. PETERS. Fhumum 'n hen Wnhinn'm; n c.

UNITED STATES PATENT OFFICE.

ALFRED CARSON, OF NEW YORK, N. Y;

IMPROVEMENT IN FIRE-PLACE STOVES.

Specification forming part of Letters Patent No. 42,074, dated March 29,1864.

T0 at whom it may concern:

Be it known that I, ALFRED CARSON, of the city, county, and State of NewYork, have invented certain new and useful Improvements in Grates; and Ido hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, making a part of this specification, in which- Figure l is afront elevation of my invention; Fig. 2, a vertical central section ofthe stme, taken in the line a m, Fig. 1; Fig. 3, a horizontal section ofthe same, taken in the line y y, Fig. 2.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention relates to certain improvements in grates such as arefitted in a fireplace and have only their front exposed.

The object of the invention is to obtain a grate of the kind specifiedwhich will radiate the heat into the room or apartment, and at the sametime serve as an air-heating device for warming apartments above that inwhich the grate is placed, all being so arranged as to economize in heatby preventing the same from escaping with the products of combustion upthe chimney or flue.

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A represents the grate, which is fitted in a slightly-inclined positionin a chamber, B, the front part of which has a flange, a, to form theexposed front, as shown clearly in Fig. 1. The back part of the chamberB at its lower part, b, is of semicircular form, and the upper part, c,is inclined, (see Fig. 2,):so as to leave a narrow throat, d, at theupper end of B, said throat-extending the whole width of the grate inconsequence of the sides of the chamber B being parallel with each otherat their front ends adjoining the flange a.

Q is a vertical plate, which depends from the inclined upper part, c, ofthe back of the chamber B and downward into the fire-chamber somedistance in front of the back of the chamber B, as shown clearly in Fig.2. In this pendent plate 0 there is an opening, 6, provided with a dooror valve, f, and in the back of the chamber B, just above the level ofthe lower end of the plate 0, there is an opening, with which two pipes,D D, communicate, said pipes extending upward at the back of B,diverging from each other and communicating at their upper ends with abox, E, thelength of which is equal to the width of B.

The throat d forms a direct communication between the upper part of thechamber B and the box E, and in the latter there is placed a slidingdamper, F, so arranged that when it is shoved back to open the throat dit will close the upper ends of the pipes D D, and when the upper endsof the latter are exposed, so as to communicate with the box E, thethroat d will be closed.

Gr is the smoke-pipe, which communicates with the box E and extendsupward in the chimney or flue.

H represents a jacket, which is placed behind the back of the chamber B.This jacket may be of semicircular form at its lower end and of squareform at its upper end, correspondin g to the shape of the box E, and ithas a pipe, I, at its upper end,which encompasses the smoke-pipe G, Ibeing sufficiently larger indiameter than G to admit of a suitablespace, 6, being between them for the passage of the heated air. (SeeFig. 2.) The space within the jacket H receives cold air, which isadmitted at its lower end either from the exterior of the building orfrom an apartment underneath.

The operation is as follows: When a direct or strong draft is required,the damper F is shoved back, so as to open the throat d and close thepipes D D. When a direct draft is not required, the damper F is drawnforward, the throat d closed, and the upper ends of the pipes D Dopened, so that they may communicate with the box E. By closing the dooror valve f of the opening 0 in the plate 0 the air which supplies thefire with oxygen will pass over the top of the fuel and down through itunderneath plate 0 and through the opening g into the pipes D D, passingwith the products of combustion up through said pipes into the box E,and thence into the smoke-pipe G, as indicated by the black arrows.

By this arrangement the air is warmed as it passes into the pipes D D,and the air within the jacket H is heated in consequence of the pipes Dand box E radiating heat within said jacket. This heated air extends uparound the smoke-pipe G Within the pipe I, and absorbs the heat from Gr,so that no appreciable amount of heat is carried off by said pipe.

By having the pipes D arranged in the form of afork a long box, IE,isobtained and a large heat-radiating surface, and by having the back ofthe chamber B of an equal width its entire height a long throat, d, andbox, IE, is ob tained equal in' length to the Width of the chamber B.The opening a admits of fuel being placed in the grate behind the plateG, and also admits, when the door or valve f is open, of a direct draftinto the pipes D D.

Having thus described my invention, What ALFRED CARSON.

set forth.

Witnesses:

Tnos. T. J. DOUGLAS, GEO. W. REED.

l l 4 I

